Lift-Off Test (Gerber): how to assess the subscapularis

The subscapularis is the "forgotten" muscle of the rotator cuff: you can't see it, you can't feel it at a glance, and many people train for years without knowing whether it's strong or weak. The Lift-Off test (or Gerber test) is the most direct way to check, and it should be in your battery whenever you suspect weakness in internal rotation or anterior shoulder instability.

What does this test measure?

The Lift-Off test specifically assesses the integrity and strength of the subscapularis, the main internal rotator of the shoulder and a key stabilizer of the glenohumeral joint. An inability to lift the hand off the back (or marked weakness when doing so) suggests subscapularis involvement, either from a tendon tear or functional weakness.

Equipment needed

• None

Step-by-step protocol

1. The subject stands with the hand behind the back, the back of the hand resting against the lower back (at waist height)
2. Ask them to lift the hand away from the back ("lift it backward, away from the body"), keeping the elbow close to the torso
3. Observe whether the subject can complete the movement and with how much strength
4. To assess strength more precisely, once the hand is away from the back, apply manual resistance trying to push the hand back toward the back while the subject resists
5. Repeat on the contralateral side to compare

Common mistakes

• Not noticing if the subject compensates with shoulder extension (moving the whole arm backward from the shoulder) instead of performing the isolated internal rotation movement
• Asking for this test in people with limited mobility to place the hand behind the back (for example, capsulitis or limited internal rotation), which invalidates the starting position — in those cases, the "Belly Press" variant (pressing on the abdomen) can be used instead
• Not comparing with the contralateral side, especially with mild weakness

How to interpret the result

Result	Interpretation
The subject lifts the hand off the back with normal strength	Negative
Inability to lift the hand off the back, or clearly reduced strength compared to the contralateral side	Positive — suggests subscapularis involvement (partial/full tendon tear or marked weakness)

A clearly positive Lift-Off (complete inability to lift the hand) has good specificity for subscapularis tears, although its sensitivity is limited for partial tears. In people who can't place the hand behind the back, the Belly Press test (pushing on the abdomen with the palm while keeping the elbow forward) is a valid alternative for assessing the same muscle.

As always, this is a screening test: it raises suspicion, but confirmation requires imaging (ultrasound or MRI) if a tear is suspected.

Relationship with other tests

• Hawkins-Kennedy Test — if there's impingement pain plus weakness in internal rotation, it's worth ruling out subscapularis involvement with this test
• Drop Arm Test — assesses another portion of the rotator cuff (supraspinatus/infraspinatus); combining them gives a more complete picture of cuff status

Why recording it matters

Subscapularis weakness often goes unnoticed until it's specifically tested for, and its recovery (with or without surgery, depending on the case) is a slow process worth monitoring. With Movalytics you can log the Lift-Off test result (or its Belly Press variant) at each assessment and track how internal rotation strength evolves over time.

Frequently asked questions

What if the subject can't place their hand behind their back? Use the Belly Press variant: with the palm on the abdomen and the elbow forward of the body's plane, ask them to push against the abdomen while maintaining that elbow position. If the elbow drops backward, it suggests subscapularis weakness. Does a positive Lift-Off mean surgery is mandatory? Not necessarily. It depends on the degree of the tear, age, activity level, and symptoms. The decision is made by a specialist after imaging assessment. Is this a painful test? On its own it shouldn't be very painful; the typical finding is weakness or an inability to complete the movement rather than intense pain. Note: this test is an orientational screening tool and does not replace a medical diagnosis or imaging study.